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Home⇒ Medical Science⇒ Microbiology⇒ Cell cultivations
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ Suspension cultures consist of cells and cell aggregates, growing dispersed in liquid medium [other wrong options] [Discuss in forum] solid nutrient medium solid or liquid medium none of these |
Q2 ⇒ Which of the following is not an indirect method for the measurement of cell mass? Cell dry weight [other wrong options] [Discuss in forum] Nutrient composition Viscosity Heat evolution |
Q3 ⇒ Stringent anaerobes can be grown in a media by taking special measure as any of these [other wrong options] [Discuss in forum] boiling the media for several minutes addition of cysteine passing through oxygen-free nitrogen |
Q4 ⇒ The size of a single plant cell is usually within the range of 20-40μm in diameter and 100-200μm long [other wrong options] [Discuss in forum] 10-20μm in diameter and 25-100μm long 40-60μm in diameter and 200-300μm long 60-80μm in diameter and 300-400μm long |
Q5 ⇒ The protoplast can be used to all of these [other wrong options] [Discuss in forum] modify genetic information create plant hybrid study plant viral infections |
Q6 ⇒ Which of the following is an abiotic elicitors? All of these [other wrong options] [Discuss in forum] UV irradiation Osmotic shock Heavy metal ions |
Q7 ⇒ The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of 600-700nm [other wrong options] [Discuss in forum] 300-400nm 400-500nm 500-600nm |
Q8 ⇒ Anchorage -dependent cells require wettable surface for growth [other wrong options] [Discuss in forum] dry surface for growth either (a) or (b) nothing to do with the surface |
Q9 ⇒ Which of the following is the necessary step for cultivating the microorganisms? All of the above [other wrong options] [Discuss in forum] Preparing a culture medium for the growth of microorganisms Sterilizing in order to eliminate all living microorganisms in vessel Inoculating the microorganisms in the prepared medium |
Q10 ⇒ Balanced growth is defined as cultures undergoing balanced growth while maintaining a constant chemical composition [other wrong options] [Discuss in forum] balancing the growth while controlling the pH balancing the growth while controlling the temperature balancing the growth while changing the nutrient composition |
Q11 ⇒ The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because they lack murein in their cell wall [other wrong options] [Discuss in forum] they contain ether-linked isoprenoids in their plasma membrane they contain 80S, as opposed to 70S, ribosomes all of the above |
Q12 ⇒ For most bacteria, the optimum pH for growth lies between 6.5-7.5 [other wrong options] [Discuss in forum] 3.5-4.5 4.5-5.5 5.5-6.5 |
Q13 ⇒ Semi-solid media, prepared with agar at concentrations of 0.5% or less are useful for the cultivation of Microaerophillic bacteria [other wrong options] [Discuss in forum] Lactobacilli E.coli all of these |
Q14 ⇒ The isolation of the gonorrhoea - causing organisms, Neisseria gonorrhoeae,from a clinical specimen is facilitated by the use of media containing certain antibiotics [other wrong options] [Discuss in forum] cellulose succinate none of these |
Q15 ⇒ Which of the following is incorrect? Their growth rate is very fast compared to microorganisms [other wrong options] [Discuss in forum] Mammalian cells are larger and more complex than microorganisms Mammalian cells are fragile Most animal cells only grow when attached to surface |
Q16 ⇒ Callus cultures are amorphous cell aggregates arising from the unorganized growth of explants on an aseptic solid nutrient medium [other wrong options] [Discuss in forum] liquid medium solid nutrient medium solid or liquid medium |
Q17 ⇒ Radical shifts in pH can be prevented by incorporating a buffer [other wrong options] [Discuss in forum] an oxidizing agent a reducing agent any of these |
Q18 ⇒ Thiobacillus thiooxidans has an optimum pH of 2.0-3.5 [other wrong options] [Discuss in forum] 0.5-6.0 6.5-7.5 9.0-9.5 |
Q19 ⇒ Which of the following is incorrect? Plant cells are less sensitive to shear than microbial cells [other wrong options] [Discuss in forum] Plant cells are larger than the bacterial or fungus cells Plant cells tend to grow in clumps Plant cells are more genetically unstable than microbial cells |